"During the past six months, my administration has made tremendous progress sending a strong message to the rest of the country that Colorado will be among the renewable energy leaders around the world, and certainly here in the United States.

"This data center moves us another step closer to fulfilling that vision."

IBM's new site is expected to start churning out greener data from April 2008.

In related news, Dell has said it will plant 1,000 trees to offset the carbon impact of computing.

The firm will partner with the National Education Computing Conference (NECC) in Atlanta and said that it will plant a tree for the first 1,000 attendees who sign up to Dell's "environmental best practices" pledge.